Faecal egg counts provide a reliable measure of Trichostrongylus tenuis intensities in free-living red grouse Lagopus lagopus scoticus

Journal of Helminthology - Tập 78 Số 1 - Trang 69-76 - 2004
Linzi J Seivwright1,2, Stephen M. Redpath1, François Mougeot1, L. Watt3, Peter J. Hudson4
1CEH Banchory, Hill of Brathens, Glassel, Banchory, Aberdeenshire, AB31 4BW, UK, :
2Department of Biological and Molecular Sciences, University of Stirling, Stirling FK9 4LA, UK
3Biosciences Building, University of Liverpool, Crown Street, Liverpool L69 7ZB, UK
4Biology Department, Mueller Laboratory, Penn State University, University Park, PA 16802, USA

Tóm tắt

Abstract

The reliability of different egg counting methods for estimating the intensity of Trichostrongylus tenuis infections in red grouse, Lagopus lagopus scoticus, was investigated in the autumn, when grouse may harbour high parasite intensities. Possible limitations to the use of these methods were also examined. Faecal egg counts were found to accurately estimate T. tenuis worm intensities, at least up to an observed maximum of c. 8000 worms. Two egg counting methods (smear and McMaster) gave consistent results, although the exact relationship with worm intensity differed according to the method used. Faecal egg counts significantly decreased with increasing length of sample storage time, but egg counts were reliable for estimating worm intensity for three weeks. The concentration of eggs in the caecum was also found to reliably estimate worm intensity. However, egg counts from frozen gut samples cannot be used to estimate worm intensities. These results conclude that, despite some limitations, faecal and caecum egg counts provide useful and reliable ways of measuring T. tenuis intensities in red grouse.

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Thông tin xuất bản

Journal of Helminthology

Tập 78 Số 1

69-76

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